1. Efterundersokning av kron-och broarbetin;Backlund;Odont Rev,1957
2. Failures in crown and bridge prosthetics;Simpson;JADA,1953
3. Why bridges fail;Willey;Ariz Dent J,1963
4. A clinical survey of the failure of crowns and bridges;Hursey;S Carol ina Dent J,1958
5. Modern practice in crown and bridge prosthodontics;Johnston,1965